Linear optical implementation of perfect discrimination between single-bit unitary operations
Pei Zhang, Peng Liang, Zhiwei Wang, Xi‐Feng Ren, Bi‐Heng Liu, Yun‐Feng Huang, Guang‐Can Guo · Journal of Physics B Atomic Molecular and Optical Physics · 2008
Discrimination of unitary operations is a fundamental task of quantum information. Assisted by linear optical elements, we experimentally demonstrate perfect discrimination between single-bit unitary operations using the sequential scheme which is proved by Duan et al ( Phys. Rev. Lett. 2007 98 100503). We also make a comparison with another perfect discrimination scheme called the parallel scheme. The complexity and resource consumed are analysed.